Car-ventilator



A. T. BEMIS. GAR VBNTILATOR.

Patented Apr. 22, 1890.

UNITED STATES ATENT OFFICE.

ALBERT T. BEMI S, OF LOUISVILLE, KENTUCKY.

CAR-VENT! LATQR.

SPECIFICATION forming part of Letters Patent N 0. 426,359, dated April 22, 1890.

Application filed January 14, 1890. $erial No. 336,920. (No model.) I

To all whom it may concern.-

Be it known that I, ALBERT T. BEMIs, of Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Car-Ventilators; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form part of this specification.

My invention relates to certain ments in car-ventilators.

The object of my invention is to provide an improved car-ventilator, whereby pure fresh air can be automatically supplied to the interior of the car or coach free from dust, dirt, or cinders, and at all times, whether the car is stationary or in motion, and which. can be located at any desired place or point on the car, at the top, bottom, or any place throughout the length thereof, and which will automatically separate all dust, dirt, and cinders from the air before it enters the car and discharge said dust, dirt, and cinders at the exterior of the car, and which will be composed of a minimum number of strong, cheap, and durable parts, requiring no attention and not improveliable to become broken or inoperative. These objects are accomplished by my invention; and it consists in certain novel features of construction and in combinations of parts,

more fully described hereinafter, and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a side elevation of a portion of a roof of a car, showing several of the present ventilators thereon. Fig. 2 is a cross-section of the car, showing two ventilators. Fig. 3 is a longitudinal vertical section of the ventilator-body on the line y y, Fig. 4. Fig. 4 is a cross section, looking down,taken on the plane of line as m, Fig. 3.

The ventilator is composed of an upright hollow drum or cylindrical body a, having a funnel-shaped or tapering bottom Z7, terminating at and opening into the upper end of a small downwardly-extending discharge-pipe e, to convey away the dust, dirt, and cinders separated from the air flowing into the body of the ventilator and discharge the same at the exterior of the car. The top of the drum is'closed, but through the closed top thereof the ventilator or pure-air pipe 0 opens and extends upwardly therefrom, and at its opposite end opens and discharges the pure air into the interior of the car. This pipe is preferably considerably larger in diameter than the discharge'tube at the bottom of the drum, and at its lower end preferably depends into the drum a suitable distance from the top thereof. An internal spiral web or flange d projects inwardly from the wall of the drum and extends around the interior of the drum from the top thereof to the lower end of the funnel-shaped bottom, ending at the induction end of the discharge-tube 6.

At its upper end, upon its periphery, the drum is provided with a pair of flaring months or funnels ff opening in opposite directions, so that one will catch the air when the car is traveling one end foremost and the other will catch the air when the car is moving in the opposite direction, and these months or funnels open into each other at their inner ends, where a transverse automatically-operated gate g is pivoted at its outer edge, so that its inner edge extends into and can swing from one side to the otherof the inlet-opening into the drum, which inlet-opeuing forms the outer end of a curved induction passage or pipe h, extending tangentially into the interior of the drum beside the depending end of the fresh-air pipe, so that the air rushing in through said passage will be directed against the wall of the drum.

It is evident that the ventilator can be placed at any desirable point in the car 'i, so that the two inlet-funnels of the inductionopening will face toward opposite ends of.

the car so as to catch the air whichever way the car is moving.

If desirable, the fresh-air pipe of the ventilator can be connected with distributing-pipes extending throughout the car. If the ventilator is placed in the roof of the car, the freshair pipe can be extended upwardly and then down into the car, while the discharge-tube extends down to an exterior portion of the car, and when the ventilator is placed in the bottom of the car the fresh-air pipe extends upwardly through the floor.

The fresh-air pipe 0 is shown extending up from the top of the car and then laterally and down, wit-h the ventilator suspended from its lower end over and a distance above one side of the top of the car.

The operation of the device is obvious. The gate g is automatically swung by the air from one side to the other of the inlet-opening, according to the direction of movement of the car, to admit the air from either funnel. The air, mingled with dust and cinders, when the car is in motion is caught by the foremost funnel and rushes in through the passage h, which discharges it tangentially against the wall of the drum, causing the air to whirl around and around within the drum with great velocity and with a downward tendency caused by the spiral flange, whereby the dust, dirt, cinders, and heavy particles in the air are'by centrifugal force thrown against the wall of the drum and their force retarded, while the spiral flange and downward and spiral whirl of the air prevent said heavy particles from being carried upward by the central stream of air, but force them down into the funnel shaped bottom and out through the discharge-tube. The air rushes around against the wall of the drum and as cends centrally and passes out of the ventilator-pipe freed from dust and cinders and in a pure condition into the car.

The depending end of the ventilator-pipe prevents any of the cinder-laden air passing direct from the inlet out at said pipe.

What I claim is 1. In a car-ventilator, the combination of the hollow body or drum having a funnel-shaped bot-tom terminating in a discharge-tube, a pure-air-exit pipe from the top of the drum, an air-inlet opening entering the drum at an angle or tangentially near the top of the same,

and an internal inwardly-extending spiral flange in the drum, substantially as described.

2. In a car-ventilator, the combination of a hollow body or drum having a pure-air exit at its top and a discharge-tube from its bottom, a spiral flange projecting inwardly from the wall of said drum and extending from the top to the bottom, and an air-inlet into the drum entering the same at an angle, whereby the air entering the drum is whirled around the interior of the same, for the purpose set forth.

The combination, with the ventilatorbody having the funnel-shaped bottom, the internal spiral flange, and the double inlet provided with a gate, of the conducting-pipe from the bottom of the ventilator and the pure-air pipe leading from the top of the ventilator-body, substantially as described.

4. The combination, with the ventilatorbody having the inwardly-projecting internal spiral flange, of the double inlet-opening having the hinged gate and the inwardly-projecting discharge portion, substantially as described.

5. The combination, with the ventilatorbody having the funnel-shaped bottom and an internal spiral flange, of the double inletopening having its discharge end projecting into the body of the ventilator, and the gate hinged at its outer vertical edge within the double inlet-opening, the pure-air pipe and the discharge-pipe leading from the ventila tor-body, substantially as described.

6. In a car-ventilator, the combination of the hollow vertical cylindrical drum having its bottom tapering to a small dust-discharge opening, a central pure-air-exit opening from the top of said drum, and the exterior inletmouth on the upper portion of the periphery of the drum, having a discharge-opening extending into the interior of the drum at an angle.

7. In a car-ventilator, the combination of the vertical cylindrical drum inclosing an open chamber having a bottom discharge-tube, the pure-air-exit pipe opening into and depending centrally into the drum from the top thereof, and the exterior inlet-mouth having a discharge-passage extending tangentially and horizontally into the top of said chamber beside said depending end, so as to direct the air against the wall of the drum at an angle.

8. The-combination, with a car, of an exterior vertical drum above the top of the car terminating at its bottom in an open discharge-tube,thedoublehorizontalinlet-mouth on the upper portion of the outer side of the exterior of the drum, and the fresh-air-inlet pipe opening into the top of drum and extending upwardly and laterally therefrom into the top of the car, substantially as described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

ALBERT T. BEMIS.

Witnesses:

J. M. QUINLAN, A. GERNLEIN. 

